对牛弹琴 (對牛彈琴) duì niú tánqín

duì niú tánqín set phrase to play the lute to a cow; offering a treat to an unappreciative audience; to cast pearls before swine; caviar to the general; to preach to deaf ears
Domain: Idiom 成语 , Subdomain: Music
Notes: (CC-CEDICT '對牛彈琴')